This part is a kind of semiconductor called BF471.

Function of this product has NPN high-voltage transistors.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET book, halfpage M3D100 BF469; BF471 NPN high-voltage transistors Product specification Supersedes data of September 1994 File under Discrete Semiconductors, SC04 1996 Dec 09 Philips Semiconductors Product specification NPN high-voltage transistors FEATURES • Low feedback capacitance. handbook, halfpage BF469; BF471 APPLICATIONS • Intended for class-B video output stages in television receivers and for high-voltage IF output stages. DESCRIPTION NPN transistors in a TO-126; SOT32 plastic package. PNP complements: BF470 and BF472. 1 2 3 Top view 2 3 1 MAM254 PINNING PIN 1 2 3 emitter collector, connected to mounting base base DESCRIPTION Fig.1 Simplified outline (TO-126; SOT32) and symbol. QUICK REFERENCE DATA SYMBOL VCBO PARAMETER collector [ ... ]

BF471 PDF Datasheet Download